Unix Tip #4351- February 8, 2014


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DELETING BLANK LINES USING GREP


To delete a blank line using a grep command you can use the next
command :-

grep -v "^ *$" file-y > file-x

where file-y is the input files has blank lines and file-x will
be the output file ( excluding the blank lines ).

if we use ( grep -v "^$" ) only , the blanck line which include
spaces will not be removed.


This tip generously supported by: yousif_morckos@yahoo.com

NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted by various unix admins around the globe. UGU suggest you read and test each tip in a non-volitile environment before placing into production.


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